DarkRP.createCategory{
name = "Citizens", -- The name of the category.
categorises = "jobs", -- What it categorises. MUST be one of "jobs", "entities", "shipments", "weapons", "vehicles", "ammo".
startExpanded = true, -- Whether the category is expanded when you open the F4 menu.
color = Color(0, 107, 0, 255), -- The color of the category header.
canSee = function(ply) return true end, -- OPTIONAL: whether the player can see this category AND EVERYTHING IN IT.
sortOrder = 100, -- OPTIONAL: With this you can decide where your category is. Low numbers to put it on top, high numbers to put it on the bottom. It's 100 by default.
}

Feel free to copy the above category, or the one below (which is without the explanation) into your categories.lua. Make sure to put it under the line at the bottom of the file.

Changing categories of default items

Changing the categories of your own custom jobs and other items is easy: just add or change the category field. However, default items might be in a category that you might not agree with.
It would be annoying if you had to disable the jobs, copy them over to your own jobs.lua file 'just' to change the categories.

Fear no more! The latest version of settings.lua contains this beauty: